2001222022 has 4 divisors (see below), whose sum is σ = 3001833036. Its totient is φ = 1000611010.

The previous prime is 2001222011. The next prime is 2001222023. The reversal of 2001222022 is 2202221002.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2001221993 and 2001222011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500305504 + ... + 500305507.

It is an arithmetic number, because the mean of its divisors is an integer number (750458259).

Almost surely, 2^2001222022 is an apocalyptic number.

2001222022 is a deficient number, since it is larger than the sum of its proper divisors (1000611014).

2001222022 is a wasteful number, since it uses less digits than its factorization.

2001222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000611013.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2001222022 is about 44735.0200849402. The cubic root of 2001222022 is about 1260.1776061893.

Adding to 2001222022 its reverse (2202221002), we get a palindrome (4203443024).

The spelling of 2001222022 in words is "two billion, one million, two hundred twenty-two thousand, twenty-two".